Table 6: Alarm LEDs and Alarm Cutoff/Lamp Test Button
DescriptionStateColorShape
Critical alarm LED—Indicates a critical condition that
can cause the router to stop functioning. Possible
causes include component removal, failure, or
overheating.
On steadilyRed
Warning alarmLED—Indicates a serious but nonfatal
error condition, such as a maintenance alert or a
significant increase in component temperature.
On steadilyYellow
Alarm cutoff/lamp test button—Deactivatesred and
yellow alarms. Causes all LEDs on the craft interface
to light (for testing) when pressed and held.
––
Related
Documentation
MX240 Craft Interface Overview on page 12•
• MX240 Alarm Relay Contacts on the Craft Interface on page 13
• MX240 Component LEDs on the Craft Interface on page 14
• Connecting the Alarm Relay Wires to the MX240 Craft Interface on page 267
MX240 Component LEDs on the Craft Interface
•
Host Subsystem LEDs on the MX240 Craft Interface on page 14
•
Power Supply LEDs on the MX240 Craft Interface on page 15
•
DPC and MPC LEDs on the MX240 Craft Interface on page 15
•
FPC LEDs on the MX240 Craft Interface on page 15
•
SCB LEDs on the MX240 Craft Interface on page 16
•
Fan LED on the MX240 Craft Interface on page 16
Host Subsystem LEDs on the MX240 Craft Interface
Each host subsystem has three LEDs, located in the middle of the craft interface, that
indicate its status. The LEDs labeled RE0 show the status of the Routing Engine in slot
0 and the SCB in slot 0. The LEDs labeled RE1 show the status of the Routing Engine and
SCB in slot 1/0. Table 7 on page 14 describes the functions of the host subsystem LEDs.
Table 7: Host Subsystem LEDs on the Craft Interface
DescriptionStateColorLabel
Host is functioning as the master.On steadilyGreenMASTER
Host is online and is functioning normally.On steadilyGreenONLINE
Copyright © 2017, Juniper Networks, Inc.14
MX240 3D Universal Edge Router Hardware Guide
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